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Per §4.12, superplasticizers can typically reduce the water content of a concrete mix by as much as:
A{'text': 'About 25 percent', 'label': 'A'}
B{'text': 'About 15 percent', 'label': 'B'}
C{'text': 'About 5 percent', 'label': 'C'}
D{'text': 'About 60 percent', 'label': 'D'}
Answer & Solution
Correct answer: A. {'text': 'About 25 percent', 'label': 'A'}
1. §4.12 reads: 'Superplasticizers… capable of reducing water content by as much as 25 percent.'
2. The result, at constant workability, is a 70-80 percent rise in strength; cement savings of 25-30 percent are possible.
_Source: IGNOU ET-522 Block-1 Unit-4 Admixtures, §4.12, p. 53_
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